If you're new to torrents you'll wanna google up uTorrent, BitTorrent or Azureus (I use Azureus) which is a download client you need.

Download one of the aforementioned programs and get it installed. Go to the above website and search one of the torrent search engines there for something you want (like salsa music!). You'll most likely find a large compilation of albums. You'll want to find something that has a good amount of downloads and the more seeders the better. (more people to download from)

Click on the searched item that you wish to get, and it will take you to a detail page, where you should find a link to download the .torrent file. Open this with the download client you got earlier and it should do the rest. (you may have to tell it where your default save location will be)

To start I would recommend searching just salsa and see what comes up. Artist specific material wasn't something I noticed much of, unless it was mainstream music. (which there is a serious abundance of)

Also remember to use peerguardian (http://phoenixlabs.org/pg2/) or something similar when you are using anything peer2peer (such as limewire or torrents,etc.) because it helps keep those nasty people from sending you emails! (lawyers, etc.) And you do need to keep it up to date (the definition files) so set it to check for updates frequently...